As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 672 MUSTY SMELL COMING FROM AIR CONDITIONING. CORRECTIVE ACTION: OPENED FWD B/B AND REMOVED BOTH RECIRC FAN FILTERS. IAW B757 AMM 21-25 SIGNATURE 889347. INSTALLED BOTH RECIRC FAN FILTERS PER B757 AMM 21-25. REF LOG 2202788. FOUND SIGNS OF OIL CONTAMINATION IN APU, R/R APU ON LOG 2203438.